I would also like to know how this is done! I can create a plane, insert a girder, and if follows the height below the roof deck (reference plane). However, I cannot figure our how to get a wood truss (purlin) to attach to the same reference plan and follow the slope of the roof. The only thing I can associate it with is a level. I cannot figure out how to slope the truss or assign different heights at each end. Please advise.
About roofs and beam systems, follow this logic: If A is aligned to B and B is aligned to C, then A is aligned to C.
If the slope of A (the roof) changes, the slope of the other two systems, B (girders) and C (trusses), will change accordingly.
See illustration.
Hello Alfredo,
Yes, I've seen this solution before. It works great when installing girder beams or I beams in Revit 2009. However, when I try to do the same with wood trusses, they automatically attach themselves to a level, not a work plane. Also, once in the model, you cannot adjust the heights at the ends of the truss, so it remains horizontal. Have you tried installing sloped trusses?
@BIll wrote:.... Have you tried installing sloped trusses?
Yes, from a 3d view, use Work plane > Set and select the sloped bottom face of the roof. Now use the cube to get a floor plan view. Insert the truss. Then adjust the trussĀ“s instance properties for bottom, top, offset, etc.